While we love a lively debate about the latest in dietary science or the hot new workout craze, the truth is that great health isn’t so complicated. It all comes down to a few simple rules. Besides exercising, eating fruits and veggies and never smoking (you already knew that, right?), here’s what the healthiest women do every day.RELATED: 21 Reasons You’ll Live Longer Than Your FriendsThey put themselves first”Many women don’t approach their own needs thoughtfully,” says David Katz, MD, president of the American College of Lifestyle Medicine and author of Disease Proof. “They just give themselves whatever is left over”—like eating scraps off your kid’s plate rather than making your own dinner, or sacrificing sleep to squeeze in an extra work report. But time for yourself should be the last thing to come off your schedule.They’re not afraid of fatWe now know that the type of fat you consume is more important than the amount. For one, low-fat diets don’t seem to be any more effective than higher-fat diets at helping people lose weight. And when it comes to heart health, replacing saturated fats with refined carbs doesn’t do you any favors—but replacing them with unsaturated fats can reduce heart disease risk by up to 25 percent, says a recent study from the Harvard T.H. Chan School of Public Health. Aim to get most of your fat from foods rich in mono- and polyunsaturated fats (such as avocados, nuts, seeds and fatty fish), says Marjorie Nolan Cohn, RDN, spokesperson for the Academy of Nutrition and Dietetics.RELATED: Best Superfoods for Weight LossThey don’t drink their caloriesOther than water, the only drinks worth a pour are coffee (mind the cream and sugar) and tea, along with the occasional alcoholic drink (no more than one per day), if you so desire. Even juices should be seen as a treat. That’s because juicing removes most of the fruit’s healthy fiber while preserving the sugar.They use a shot of sunscreenAs in 1 ounce, enough to fill a shot glass, spread out over every exposed inch of the body. Don’t forget places like your ears (the third most common spot for basal cell carcinoma, a type of skin cancer), neck, the back of your hands and—during sandal season—your toes, plus SPF lip balm.RELATED: 22 Strange Ways the Sun May Affect Your BodyThey don’t fight stress with screensBy the end of a long, harried day, the path of least resistance is often paved with wine, Häagen-Dazs and endless mind-dulling games of Candy Crush. But these types of activities offer only instant gratification—a little hit of dopamine in the brain’s reward center. “Do something instead that fosters a genuine positive emotion; that’s what induces feelings of calm and safety and puts the brakes on your body’s stress response,” says sociologist Christine Carter, PhD, senior fellow at UC Berkeley’s Greater Good Science Center and author of The Sweet Spot. One of the best ways to tap into good vibes: Connect with others in person, not just via Instagram and Facebook likes…

Use a small stability ball behind your lower back to engage your core in this ab strengthening move. Watch this video to see a FlyBarre instructor demonstrate how to do this move so you can get a flat belly and tight abs in no time.

What is up with my hair?!If it doesn’t seem as healthy as it used to, blame it on…life. “Aging can make hair thinner, drier and less manageable,” notes dermatologist Shani Francis, MD, director of the Hair Disorders Center of Excellence in Skokie, Ill. The trick is to restore hydration, add volume and replenish shine. Here’s your total plan.Bring Back Softness”I love how dry and brittle my hair is!” said no one ever. There’s a scientific explanation for why it’s like that: “Since oil glands are mostly under hormonal control, they can become less active as your body changes over time,” says Dr. Francis. Turning up the heat on your dryer or curling iron only adds to the parching problem.TREAT ITRestore your hair’s natural lipids with a weekly fix such as Kérastase Paris Resistance Masque Therapiste ($34; amazon.com), which packs hydrating plant sap plus peptides and amino acids to strengthen abused follicles.STYLE ITCoat damp hair with a thermal protectant that hasceramides; they bind to hair and reduce breakage, found a study in the International Journal of Cosmetic Science. Try Phyto Phytokeratine Repairing Thermal Protectant Spray ($32; sephora.com). The suppler your strands, the less breakage youll see.RELATED: 6 Nutrients for Healthy HairBoost FullnessThinning often happens gradually, but for some of us, it seems to occur overnight. One day you look in the mirror and—gasp!—you can see scalp. Or you notice your ponytail isnt as full. “Hair goes through growing cycles, and at a certain age, it can slow down,” says Dr. Francis. But all is not lost: Those sluggish follicles can be awakened.TREAT ITOD’ing on products leaves behind buildup that can impede hair growth. ReGenesis Thickening Shampoo ($34; nordstrom.com) has willow bark to de-gunk and flax protein to plump strands. For significant thinning, the go-to ingredient is minoxidil. It’s the only over-the- counter drug that’s FDA-approved for stimulating hair growth in women. Find it in Women’s Rogaine Hair Regrowth Treatment ($30 for a one-month supply; ulta.com). With daily use, you can expect results in as early as 12 weeks. Also FDA-approved to spur hair growth: low-level red-light laser therapy. The HairMax LaserComb Ultima 12 ($495; neimanmarcus.com) is an investment, but it can be as effective as minoxidil, says Dr. Francis, and more so if it’s used in conjunction with the drug. Run the pronged wand over your scalp three times a week for eight minutes to see improvement in 12 weeks.STYLE ITYou guessed it—use volumizing spray. Try BloPro Blow Back Time Texture Spray ($20; blowpro.com), which infuses hair with specks of bulk-boosting powder. (No worries; its invisible.) Focus on the roots of dry hair, holding up 2-inch sections and spritzing them, says Nunzio Saviano, owner of the eponymous salon in New York City. “Brush through for more oomph.”RELATED: 10 Foods for Stronger Nails and Thicker Hair

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Erase the GraysYou may blame stress, but the reality is that the production of pigment in hair follicles starts to lag with age (at what point depends on your genes)…